金的挥发性极差,在熔点温度之上至1300℃几乎无挥发性,但在煤气和CO气氛中挥发性大大增加。因此,在碳覆盖层下熔炼金会因挥发而造成金的损失。 金的延展性极好。1g纯金可拉成3500m长、直径0.00434mm的细丝,或压成厚度为0.23×10-8mm的金箔。 根据矿物中金的结构状态和含金量,可将金矿床矿物分为金矿物、含金矿物和载金矿物三大类。所谓金的独立矿物,系指以金矿物和含金矿物形式产出的金,它是自然界中金最重要的赋存形式,也是工业开发利用的主要对象。
The volatility of gold is very poor, and it is almost no volatile at 1300 degrees Celsius above the melting point, but the volatility is greatly increased in the gas and CO atmosphere. As a result, the melting of gold under the carbon covered layer will result in the loss of gold. Excellent extension of gold. 1g gold can be drawn into 3500m long, 0.00434mm diameter filaments, or pressed into a thickness of 0.23 * 10-8mm gold. According to the structure state and the gold content of the gold deposit, the gold deposits can be classified into three types: gold minerals, gold bearing minerals and gold bearing minerals. The so-called gold independent minerals, the system refers to the gold and gold bearing minerals in the form of gold, it is the most important form of natural gold, but also the main object of industrial development and utilization.
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